Elma 3036s + 3038s +
BM126s
Page 35
If a flame signal current with inadequate strength or fluctuation beyond 10%, check the
following to avoid the risk of unwanted flame relay dropout :
1-1) For gas or oil flames (Minipeeper):
Low supply voltage
Detector location
Defective detector wiring
Dirty viewing windows
Faulty Minipeeper
1-2) For oil flames (Photocell):
Detector location & wiring
Smoky flame or poorly adjusted air shutter
Faulty Photocell
Temperature over 165 F (74 C) at photocell
1-3) For gas flames (Flame Rod):
Ignition interference (A flame signal current difference with the ignition both on and off
greater than 0.5
µ
A indicates the presence of ignition interference)
Insufficient ground (must be at least 4 times the detector area)
Flame lifting off burner head (ground), or not continuously in contact with the flame rod
Temperature in excess of 600 F (316 C) at the flame electrode insulator causing short
to ground.
HOLD
The hold feature freezes the display for later view. Press the HOLD
button momentarily to
activate and to exit the hold feature in the following function(s):
BM111 & BM112: All functions
BM125 & BM126s: Upper display ACA function
MAX
The max feature compares and displays the measured maximum value as fast as 30ms with
auto-ranging capability. Press the MAX
button for 1 second or more to activate and to exit
the max feature in the following function(s):
BM111 & BM112: DCV, ACV & ACA functions
BM125 & BM126s: Upper display ACA function
Relative Zero
Mode (BM111 & BM112 only)
Relative zero
mode allows the user to offset the meter consecutive measurements with the
displaying reading as the reference value. The display will now show readings relative to the
stored reference value. That is, display = reading - stored value. Press the
button
momentarily to activate and to exit relative zero mode.
Auto-Ranging
Where there is more than one measuring range under a selected meter function, the LCD
annunciator “a” turns on. The meter will automatically switch to the best resolution range when
making measurements. No manual ranging selection is required.
Auto Power Off (APO)
When the meter is on, the Auto Power Off (APO) feature will switch the meter into a sleep mode
automatically to extend battery life after approximately 30 minutes of no slide-switch nor push
button operations. To wake up the meter from APO, press the buttons momentarily or set the
