Wavetek Datron 4705 Calibrator Manual Request - Page 1
Forum section: electronics / testgear

author: Kryan9
author_rank: Contributor
timestamp: March 01, 2014, 11:06:31 pm
content: Hi,I've found in the lab I'm working in at school, a Datron 4705 Calibrator, sitting on the shelf looking rather lonely.Interested in attempting to use it to calibrate a Keithley 2001 that I have (for several reasons I won't mention right now, although both appear extremely old), I connected it to the Keithley and turned it on. However, on boot-up the Mode/Frequency display will only show "Error OL", which I don't recall what that might indicate. It refuses to turn it's output on.There appears to be very little information available about this model online - could anyone give me some tips or a direction to look for information on what this error is and how to fix it?For all I know, it was sitting on the shelf because it might really be broken internally.Thanks.

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: March 01, 2014, 11:50:33 pm
content: Hi,On the lower right there is a switch marked output ON. What happens if you press this switch?I am not familiar with this unit. Do you see any terminals or switches that are marked 'sense'? If they are you may need to set a 2 wire mode or use 4 wire cables.Jay_Diddy_B

author: Kryan9
author_rank: Contributor
timestamp: March 01, 2014, 11:59:15 pm
content: I've tried pressing those - the off button remains lit regardless of whether I press the reset, on -, on+ or off button. For a split second when I press any button, a "B" shows up on both displays on the far right before going back out.The only terminals that appear to be available are the ones on the bottom left, marked ground (green), guard (white), I+ (brown), I- (blue), Hi (red), and Lo (black). So far I've only tried connecting the Hi and Low to the main input terminals on the Keithley, with no change in operation.

author: Kryan9
author_rank: Contributor
timestamp: March 02, 2014, 12:00:48 am
content: As an addendum to that, the unit does let me select and modify the calibration settings and ranges. Such as, pressing DC will light up the DC button, and the output meter (right screen) does change with the button presses beneath it.

author: PedroDaGr8
author_rank: Super Contributor
timestamp: March 02, 2014, 05:31:13 am
content: I'd try connecting high, low, I+ abd I-. It might be the I lines are for sensing abd leaving them floating causes the error. Since this is a calibrator that's more possible than with a usual power supply. Not saying it's it but it's what I'd try first.Sent from my EVO using Tapatalk

author: casinada
author_rank: Frequent Contributor
timestamp: March 02, 2014, 07:58:42 am
content: Be careful as this is not a toy, it can produce lethal voltagesspecially if is not working properly. I would start by trying the Ohms mode.Try to download the manual for similar equipment such as Fluke 5100B calibrator.

author: quarks
author_rank: Frequent Contributor
timestamp: March 02, 2014, 08:37:33 am
content: Error OL is indicating current limit overload in voltage ranges or load impedance to high in current ranges.

author: Mickle T.
author_rank: Frequent Contributor
timestamp: March 02, 2014, 08:45:13 am
content: This is the bad errorWith 99% probability device lost all of the calibration settings due to back up battery discharge.There is a "Test" button on the calibrator's front panel. Try to run this mode. FAIL 2 and FAIL 6 ?