M = INPUT COUNT MULTIPLIER (TRIMPOT SETTING OF EITHER 1, 10, OR 100)
R = RATIO OF:
S = COUNT TIME IN 1 CYCLE PER SECOND INCREMENTS (SWITCH SETTING)
I
p = INPUT PULSES PER REVOLUTION (SEE PICK-UP SELECTION GUIDE - page 3)
DESIRED DISPLAY READING AT KNOWN RPM
KNOWN RPM
(This is specified by the user. It is necessary to know the desired display readout at a particular RPM).
MS =
R x 3600
(use 3000 for 50 Hertz application)
I
p
4
FIELD PROGRAMMING THE DM4000 SERIES
The DM is supplied from the factory preset to measure an input of 1 pulse per revolution - read in RPM (Pick-up not
included). If operating with different pulse inputs, field programming is required.
STEP 1
Remove the 2 black screws from the lens face and remove the lens assembly.
STEP 2
Locate the Timer Switches and the Multiplier Trimpot by observing the diagram below.
DM4005
FIELD PROGRAMMING FORMULA:
MULTIPLIER
TRIMPOT
DISPLAY
PANEL
TIMER
SWITCHES
DM4000 - FRONT VIEW WITHOUT LENS
Example: Find R - We want the meter to display 15 feet per minute at a shaft speed of 1000 RPM.
Therefore R = 15 / 1000 = 0.015.
Example: Use Programming Formula for the DM4004 - A motor drives an auger which moves material and we want displayed
lbs/hr. of material moved. We know that at 990 RPM we move 435 lbs. of material per hour. We selected the PU-2E
as the appropriate pick-up from the SELECTION CHART on page 3. The PU-2E has an
I
p of 1.
Therefore MS = 435/990 x 3600 = 1581.8
1
STEP 3
DM4004
FIELD PROGRAMMING FORMULA:
M = INPUT COUNT MULTIPLIER (TRIMPOT SETTING OF EITHER 1, 10, OR 100)
A = KNOWN RPM
S = COUNT TIME IN 1 CYCLE PER SECOND INCREMENTS (SWITCH SETTING)
I
p = INPUT PULSES PER REVOLUTION (SEE PICK-UP SELECTION GUIDE - page 3)
(Maximum reading of 59 minutes and 59 seconds).
MS =
[A x (B x 60 + C)] x
I
p
3600
(use 3000 for 50 Hertz application)
B = DESIRED DISPLAY (READING IN MINUTES)
C = DESIRED DISPLAY (READING IN SECONDS)
(continued on following page)
