Thermocouple Monitor
SR630 — Thermocouple monitor (16-channel)

SR630 Thermocouple Monitor· 16 channels· B, E, J, K, R, S and T type thermocouples· 0.1 °C resolution· Displays °C, °F, K and VDC

Temperature Monitor
The SR630 is a 16-channel thermocouple monitor designed
to read, scan, print and log temperatures or voltages. Youcan use any one of seven standard thermocouple types toread temperatures from –200 °C to +1700 °C. For remotemonitoring applications, the SR630 can time-stamp and store
up to 2000 readings in non-volatile memory for later analysis.

· Four analog outputs proportional
to temperature

Temperature readings from the SR630 can be viewed on thefront panel or queried via the instrument’s standard RS-232 or
GPIB interfaces. In addition, the standard Centronics printerport provides convenient hardcopy output in either tabular or
strip-chart format.

· GPIB, RS-232 and printer interfaces

Voltage Monitor· 2,000 point non-volatile memory

The SR630 can also be configured as a 16-channel DC
voltmeter with full-scale ranges from 30 mV to 100 V (1 mVresolution). As a voltmeter, the unit has 0.05 % accuracy and1 µV input offset drift. Each channel can be set independently
to monitor either temperature or voltage, giving the SR630
even more flexibility in your application. Four rear-panel
outputs are also available to provide a voltage proportional to
the temperature of the first four input channels. The voltage
outputs can be used to drive recorders or to control externalinstrumentation.
· SR630 ... $1495 (U.S. list)

Stanford Research Systems

phone: (408)744-9040
www.thinkSRS.com

SR630 Thermocouple MonitorInputs
Sixteen screw-terminal inputs are mounted on a rear-panel
isothermal block for cold junction compensation. The isolateddifferential inputs have a 250 V breakdown level, allowing
the SR630 to tackle difficult applications such as temperature
profiling of electrically live equipment. Each of the 16 channels
may be independently set to display in units of °C, °F, K, mV
or V. Similarly, thermocouple type, nominal temperature,temperature limit, and alarms may be uniquely set for eachchannel, providing complete flexibility in the configuration of
the instrument. Access to any channel parameter is provided
through the front panel or via the computer interfaces. TheSR630 can store up to nine instrument configurations including
thermocouple type and temperature limits for all 16 channels.

time-stamp, and record data on up to 16 channels at intervals
from 10 to 9999 seconds. Data is either sent immediately
to the printer or stored in the internal 2,000 point buffer for
output at a later time (via GPIB or RS-232).
Built-In Printer Interface
A standard Centronics printer interface makes it simple toget hardcopy output of temperature or voltage scans. Twohardcopy formats are provided. The SR630 can print a
continuous strip chart showing up to 16 different temperatures(see example below). In addition, data can be printed in atabular format (see example below and left) which logs thetime, date, and temperature or voltage for each channel.

Outputs
There are four analog outputs that are proportional to thereadings on channels one through four. Both the slope (m)and offset (b) of the equation, Vout = ±mX + b, are changed
by setting the nominal temperature and chart span for thecorresponding channel. X is either temperature or voltage,
depending on the setting for each channel.
You may use the analog outputs to drive chart recorders,or they can provide a feedback signal for proportionaltemperature control systems. They may also be used as fixedlevel, analog control signals (set via the computer interfaces).
AlarmsEach channel can be programmed individually with an
upper and lower temperature limit. An audio alarm and arelay closure indicate when any channel exceeds its preset
temperature or voltage limits. The front-panel LED display
will indicate which channel has exceeded its limit.
Data Logging
An internal, battery backed-up clock/calendar is used to timestamp temperature readings. The SR630 can be set to scan,

Strip chart output
Analog Multiplexer
The SR630 can also function as a 1:15 analog multiplexer. Anyof the first 15 input channels can be switched out to channel
16 and passed on to other instruments. This feature is useful in
ATE systems and many other monitoring applications.
Available Thermocouples
Although the SR630 will read types B, E, J, K, R, S and T
type thermocouples, for many applications type K (Chromel/Alumel) will serve well. K-type thermocouples offer a wide
temperature range (–200 °C to +1250 °C), low standard error,and good corrosion resistance.

Tabular output

Stanford Research Systems

phone: (408)744-9040
www.thinkSRS.com

SR630 Specifications

Thermocouple
Channels
Thermocouple types
Display units
Display resolution
Temperature displays
Accuracy

General
16
B, E, J, K, R, S, T°C, °F and K
0.1 °C
Actual, Nominal, or Offset
0.5 °C for J, K, E and T1.0 °C for R, S and B
Errors are for the SR630 only.
Standard errors for thermocouple
wire are 2 to 5 times the error due
to the SR630.

Analog outputs

Relay output
Store and recallInterfaces

PowerDimensions
WeightWarranty

InputsChannels
Input type
Input resistance
Input capacitance
Input bias current
Input protection
Open circuit check
Common mode

16
Independent, floating and differential
10 MΩ between + and – terminals,>1 GΩ to ground0.001 µF
<100 pA
250 Vrms
250 µA±200 VDC

Four analog voltage outputs
proportional to temperature ofchannels 1, 2, 3 and 4
Switching 10 A
Nine locations for instrument set-up
RS-232, GPIB and Centronics
ports (standard). All instrument
functions may be set and read via
RS-232 or GPIB.
10 W, 100/120/220/240 VAC,
50/60 Hz8.5" × 3.5" × 13" ( WHD )9 lbs.
One year parts and labor on defects
in materials and workmanship

Voltmeter
Full-scale display
Range selectResolution
OffsetGain accuracy
Conversion rateLine rejection(±9.999, ±99.99 or ±999.9) mVDC,(±9.999 or ±99.99) VDC
Automatic±1 of least significant displayed digit±2 of least significant displayed digit
0.05 %
10/s for 50 Hz line, 12/s for 60 Hz>100:1

SR630 rear panel

Scanning and Data Logging

Ordering Information
Scanning

Alarm
Scan enable
Printer output
Data memory

Selected channels will be scanned.
Dwell time between scans is set
from 10 s to 9999 s.
Temperature or voltage limit foreach channel
All channels may be scannedor skipped
Voltages, temperatures, time anddate as a list or in a graphical format
Last 2000 measurements in battery
backed-up memory

Stanford Research Systems

SR630
O630KF1
O630KF2
O630KT1
O630KT2
O630RMD
O630RMS

Thermocouple monitor
K-type thermocouples,5', fiberglass, qty. 5
K-type thermocouples,10', fiberglass, qty. 5
K-type thermocouples,5', teflon, qty. 5
K-type thermocouples,10', teflon, qty. 5
Double rack mount kit
Single rack mount kit

phone: (408)744-9040
www.thinkSRS.com