Weighing Environment Analyzer✓ Daily and periodic checks of balances□✓ Uncertainty calculation for balance calibration□✓ Minimum weight calculation□✓ Assessment of measurement environment□✓ Remote balance display and control□

BM-20 (sold separately)

ISO9000 CERTIFIEDDo You Know What It Takes to Properly
Manage Balance Quality and Performance?
How would you like to have someone from A&D – an expert on balances – sitby your side, advise you what to carry out and how, and even create reports
for you to meet documentation requirements, whenever and as often asnecessary? For A&D’s balances i, you can essentially make all this happen
with just one device: the AD-1691 Weighing Environment Analyzer!
* i Please inquire regarding connectivity with other manufacturers’ balances

Operation with 7-inch color touch-panel LCD
The AD-1691 makes various tasks related to balance
management quick and easy for every user. All you have to do
is follow the displayed, step-by-step guidance and touch thescreen to enter prompted information, commands, selections,etc.
Comes with a dedicated touch pen and holder▶

1. Daily and periodic checks of balances
If you need to implement standard operating procedures (SOP) for quality andperformance verifications but aren’ t sure where to look, these functions can assist you.

Daily balance check
Confirmation of external appearance

Confirmation of measurement environment

Confirmation of power supply

For daily checks, you are simply asked todetermine whether the condition is “met” or “notmet” for each check item i i . The check items
include those which A&D recommends as themost basic ones to confirm that the balance meetsproper conditions for use.
Whether to check all or only some of these items
will be up to you, depending on your workplacepolicies and requirements.

Confirmation of level balance

Measurement confirmation* ii The AD-1691 need not be connected to the balance to performa daily check.

Confirmation of level balancePeriodic balance check
Three kinds of tests are prepared for the periodic
check; namely, those for repeatability, accuracy /linearity, and eccentricity error. You can easily
perform one, two, or all of them in accordancewith your set specifications.

Repeatability

Accuracy / Linearity

Eccentricity error

Test for linearity▶ Quick glossary
Explanation of each periodic check item canbe accessed by touching the “ii button in theupper-right corner of the screen.

Explanation of linearity

2. Uncertainty calculation for balance calibration
Regular calibration of balances is essential to ensure the reliability of your measurement
data. The AD-1691 lets you warrant accuracy even when a third-party calibration service
cannot be used frequently.

Calibration
weightChangein weightby age

Airbuoyancy

Eccentricity
error

Expandeduncertainty(k=2)

Rounding
error

Temperature
coefficient

Repeatability

Seven uncertainty components

In a precise sense, a calibration report is only
complete when the uncertainty of themeasured value is provided. However, its
estimation normally involves highly
complex mathematics, not to mention
knowing what uncertainty components
exist.
With the AD-1691, the whole thing becomesvery simple. Just enter information andperform tests as per on-screen instructions,and the AD-1691 will calculate the expanded
uncertainty (coverage factor k=2) of yourbalance calibration right on the spot, basedon seven uncertainty components.

Eccentricity error test

Uncertainty calculation results

Reporting results
For documentation required by ISO, GLP, GMP, etc., daily/periodic check or
calibration (uncertainty calculation) results can be saved to a USB flash drive in PDF
report formats. Daily/periodic check results can also be outputted to a printer.

Daily check report (PDF)

Periodic check report (PDF)

Calibration report (PDF)

3. Minimum weight calculation
To know the minimum weight, you’ ll have to send for the balance manufacturer
or a third-party specialist and ask them to work it out, right? – Wrong!
When performing a repeatability test for a periodic check, theAD-1691 also automatically calculates the minimum weight as
defined by the United States Pharmacopeia (USP) iii.
* iii Supports the newly-revised standard (effective since December 2013)

Minimumweight

Repeatability test for a periodic check

Repeatability test report4. Assessment of measurement environment
Crack the mystery of invisible environmental culprits that destabilize yourmeasurements. This is where the product name “Weighing Environment Analyzer”
comes from.
Analytical balances, microbalances among others, are highly susceptible to external
disturbances like temperature changes, vibrations, drafts, etc. These disturbances are
typically imperceptible to humans, leaving many users clueless about the lack of precisionin their balances.
To solve this problem, A&D invented the “A&D Measurement Environment Evaluation
Tool” , or AND-MEET, which helps deduce what factors in the set-up environment areaffecting the stability of measurements. Once those factors are identified, it becomes
possible to devise corrective measures to elicit better performance from the balance (andthereby improve the minimum weight as well).

Taking data from the BM-20 microbalance

AND-MEET report (PDF)

AND-MEET was originally available for use only by qualified specialists at A&D. The
AD-1691 now allows you to conduct assessments yourself with it when using A&D’ s BM
series of micro analytical balances.

5. Remote balance display and control
What happens to the AD-1691 while none of the above-mentioned tasks are being
carried out? Just laid aside? – Check this feature that will actually make theAD-1691 both handy and important at all hours.
The AD-1691 can be used as a separate
touch-panel display for an A&D balance(with an RS-232C interface).
Use of this function is especially recommended
for the BM-20/22 microbalances, as theslightest tilting or tremor caused by direct key
operation could compromise their accuracy
and precision (the ION key is available tocontrol their built-in static eliminator).

Console screen**Specifications
TFT color LCD with backlight (7 inches, 800 × 480 dots)

Display

Adjustable to 10 levelsiv

LCD backlight brightness
Data transmission
Operating environment

RS-232C × 3, USB (1.1) × 2v
5 to 40°
C (41 to 104°F ), 85% RH or less (no condensation)
AC adapter

Power supply
Power consumption

Approx. 30 VA

External dimensions

203 (W) × 153 (D) × 58 (H) mm, excluding protrusions
Approx. 1.0 kg

Net weightStandard accessories

Instruction manual, Touch pen with holder, AC adapter, three balance connection cables(D-Sub 9-9, D-Sub 9-25, D-Sub 9-DIN 7), Stand attachment*iv Set to the maximum brightness by default*v For inserting USB flash drives (the two slots cannot be used at the same time)

Dimensions▶Device setting screensDate, Time settings

LCD setting

RS-232C settings*AD1691-ADCC-01-BP1-14701