ACT Meters CALMASTER - Manual (Page 3)

FIRST STEPS
1. Connect power lead between CALMASTER and suitable AC mains
supply
2. Switch on AC supply and confirm that CALMASTER red neon is lit
3. Turn all CALMASTER controls to the fully anti-clockwise position
4. IMPORTANT: Remove AC mains lead when testing resistance to
ensure stable resistance reading
Testing AC Voltage
1. Connect ‘Calibrated Meter’ and ‘Meter Under Test’ to CALMASTER left
sockets
2. Switch both ranges to ‘AC Volts’ range
3. Turn ‘AC Volt Adjust’ to the desired voltage and confirm that the
‘Meter Under Test’ reading is within ±5% of the reading displayed on
the ‘Calibrated Meter’
4. Log readings obtained for calibration records
5. Repeat above on all AC voltage ranges on the meters
6. On completion return all control back to the fully anti-clockwise
position
CALMASTER
Operating Instructions
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CALMASTER
Operating Instructions
Testing Resistance
1. Connect ‘Calibrated Meter’ and ‘Meter Under Test’ to the CALMASTER
middle sockets
2. Switch both meters to ‘Resistance’ range
3. Turn the ‘FINE’ or ‘COARSE’ controls to the desired resistance on the
‘Calibrated Meter’
4. Switch the CALMASTER from the ‘Calibrated Meter’ to the ‘Meter
Under Test’ and confirm that the reading is within ±5% of the reading
on the ‘Calibrated Meter’
5. Log readings obtained for calibration records
6. Repeat above on all resistance ranges on the meters
7. On completion return all controls back to the fully anti-clockwise
position
Testing DC Voltage
8. Connect ‘Calibrated Meter’ and ‘Meter Under Test’ to the CALMASTER
middle sockets
9. Switch both meters to ‘DC Volts’ range
10. Switch CALMASTER to the ‘DCV Both Meters’ position
11. Turn the ‘FINE’ or ‘COARSE’ controls to the desired voltage and
confirm that the ‘Meter Under Test’ voltage reading is within ±5% of
the reading displayed on the ‘Calibrated Meter’
12. Log readings obtained for calibration records
13. Repeat above on all DC voltage ranges on the meters
14. On completion return all controls back to the fully anti-clockwise
position