User guide

REV 3 DIGITMR USER’S MANUAL
10
2.0 PRE-TEST SETUP
2.1 Operating Voltages
The DigiTMR’s operating voltage is preset at the factory and is selectable between 100-120 Vac,
50/60 Hz or 200-240 Vac, 50/60 Hz. To set the proper operating voltage, the voltage selection
jumper must be configured properly as shown in Table 3. The initiate relay with the correct
operating voltage is also required. The jumper connector is shown in Figure 2 and is marked as
“JP3/VOLT SEL” on the circuit board.
Table 3. Voltage Selection Jumper Settings
Voltage Selection PINS Relay Part Number
100
–
120 Vac
1 & 2, 3 &4 HE2aN-Q-AC120V
200
–
240 Vac
2 & 3 HE2aN-Q-AC-240V
Figure 2. Voltage Selection Jumper Settings and Initiate Relay
2.2 Main Power Fuse
The DigiTMR uses an AC input module containing the AC receptacle, power switch, and
protective fuses. The fuses are 3-Ampere, 20mm, 250Vac, fast-blow types. The OPEN and
CLOSE initiate uses 5-Ampere, 3AG, 250Vac, slow-blow type fuses.
2.3 LCD Screen Contrast Control
To increase the LCD screen contrast, press and hold the
[PAPER ∧ Contrast] key for two
seconds.
To decrease the LCD screen contrast, press and hold the [PAPER ∨ Contrast] key for two
seconds.