Calibration Procedure; Calibration Menu; Start Calibration - Chroma 19572 User Manual

8. Calibration Procedure

Calibration equipment:
1. Standard resistance 10m/100m/150m/500m Ω
2. Agilent 34401A Digital Multimeter or above
3. Yokogawa TYPE 2215 50A Current Shunt or above
Before process this section the tester should be warm up at least 30 minutes. Press the
calibration switch (CAL), it is equipped with hardware protection circuit to avoid calibration
data loss.
The following items are needed to calibrate:
GBA 45A Offset (3A)
GBA 45A Full (30A)
GBVX1 8V Offset (0.3V)
GBVX1 8V Full (3V)
GBVX10 8V Offset (0.03V)
GBVX10 8V Full (0.3V)
CONTRAST VALUE
8.1

Calibration Menu

1. After powered on and initialized, press function key [MENU] [DOWN] [DOWN] [DOWN]
[SELECT] in sequence to enter CALIBRATION function. Display input calibration
password menu.
2. Press function key [A] [A] [A] [B] [SELECT] in sequence. Display calibration menu.
8.2

Start Calibration

Connect Yokogawa TYPE 2215 Current Shunt (50 mV, 50A, with four terminals) or equivalent
shunt to Sense and Drive terminal of 19572. By using 34401A DMM to set ACV Meter and
Auto Range function simultaneously, measure TYPE 2215 Current Shunt SENSE +/-
terminals.
Display GBA 45A OFFSET (3A)
3.00A
Press [STOP] [START]
Press [INC.] or [DEC.] until 19572 LCD STANDARD display 2.897 A
Press [ENTER]
Press [STOP]
Press [UP] key to display
Display GBA 45A FULL (30A)
30.00A
Press [STOP] [START]
;GB current
;GB current
;GB voltage X1
;GB voltage X1
;GB voltage X10 OFFSET
;GB voltage X10 FULL
6 ;Contrast Value
; Grounding current offset.
; Read out the ACV meter value
; Example 2.897mV
; Save calibration value into the memory
; Stop GBA offset calibration.
; Grounding current full scale.
; Read out the ACV meter value
; Example 29.87mV
Calibration Procedure
OFFSET point
FULL point
OFFSET point
FULL point
point
point
8-1