OLIVER
IGD
OLIVER
IGD
10. Calibrating Analogue Output Cards
V1 IN
I1 OUT
V1 OUT
GND
V1 IN
I1 OUT
V1 OUT
GND
V1 IN
I1 OUT
V1 OUT
GND
V1 IN
I1 OUT
V1 OUT
GND
Ribbon Cable Input
From Tocsin 700
Ribbon Cable Output
To Next Add On Card
Blue
Orange
0V Sig
1
1
2
3
4
MA
MA
Com
4.12
Analogue output channels are calibrated using the 420 OUT CAL and 420 OUT ZERO functions located
on the ENGINEER menu. You will need to connect a calibrated ammeter as indicated in the following
diagram.
Procedure
1. ENGINEER
Enter the ENGINEER menu
2. 420OUT CHANNELS
Check the 420OUT CHANNELS function is correctly set, this number is set in blocks of 4 channels, i.e 1
card fitted then set 4
3. 420OUT ADDRESS
Check the 420OUT ADDRESS function is correctly set, for example channel 1 is sourced from detector
input 1
4. ZERO
Use the 420 ZERO function to correct the 4mA output setting. Do this by entering the difference in
meter reading, the software then corrects for the deviation. In the example above reading indicates 4.12
so enter -0.12.
5. 420CAL
Use the 420CAL function in the same way to correct the FSD 20mA output. Do this again by entering the
difference in meter reading, the software then corrects for the deviation.
6. 420TEST
Use this function to check for correct operation. Use the jog wheel to increase and decrease the
indicated reading, this should match the ammeter reading.
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