Mini-Max M245 Series Digital Panel Meter
Minimum Depth Indicator - Less than 2.5” (60mm) of
Space Required Behind the Panel
Stackable Mounting Bracket for Easy Installation
LCD: 4-1/2 Digit, 0.5” (12.7mm) High LCD Display with
Optional Negative Image, Bright Red Backlighting
DC Process
LED: 4-1/2 Digit, 0.4” (10.2mm) High Display
Limited Range Display Scaling and Adjustable Oset
Standard Screw Terminals for Easy Installation
Four Ranges: 4-20mA, 1-5VDC, 0-10 VDC, 0-100VDC
85-250VAC or optional 9-32VDC Power Supply
Scaled 0-100%
Simpson’s Mini-Max Process Indicators provide high quality
accuracy and reliability in a compact, 60mm deep case.
LCD (Liquid Crystal Display) Units oer a 4-1/2 digit, 0.5”
(12.7mm) LCD display with an optional bright red, negative
image, backlight.
LED (Light Emitting Diode) Units oer a 4-1/2 digit, 0.4”
(10.2mm) display.
Installation and Panel Cutout
LCD
LED
All units feature user-selectable decimal point, auto zero and
limited scaling capabilities.
A unique mounting bracket is provided to allow for vertical or
horizontal stacking of multiple indicators. All Mini-Max units
feature a 3/64 DIN, high-impact plastic case. The LCD
units have a clear viewing window, and the LED units have a
red viewing window.
2.68” (68mm)
2.84" (72mm)
0.95"
(24mm)
0.16"
(4mm)
0.88" (22.2mm)
2.68"
(68mm)
2.36" (60mm)
0.13" (3.18mm) Max
Panel Thickness
0.874””
(22.2mm)
Mounting Requirements
Insert the Mini-Max through the panel, and then slide the mounting bracket
onto the Mini-Max. The mounting bracket allows Mini-Max units to be
stacked side-to-side or top-to-bottom and maintain the DIN standard
panel arrangements in 24mm by 72mm multiples. Panel cutout instructions for stacking multiple units are provided under “stacking features.”
Display Scaling
TOP HALF
OF CASE
FRONT
OF METER
Using a screwdriver or thumbnail,
spread the tabs on each side of the case
to unlock the top half. Lift the rear of the
top half and slide it away from the front of
the meter.
Scale Adjustment:
Mini-Max indicators have limited range
scaling. There are no optional connections
required for these to function. The meter
can be scaled down to 1/2 the value of the
input, or scaled up to 1 times the value of
the input, or a maximum reading of 1.9999,
whichever is lower.
LOCKING
TAB
LCD VERSIONS
Scale Adjustment:
The "Coarse" adjustment R12 will allow a
limited range of scaling values. The
"Fine" adjustment R9 allows for an adjustment range of approximately 1% of the
"Coarse" adjustment. Apply the full scale
input to the meter. Adjust R12 to be within
1% of the desired result. Then use R9 to
The “Coarse” adjustment R7 will allow
ment. The “Fine” adjustment R6 allows for
an adjustment range of approximately 1%
of the “Coarse” adjustment.
on the 4-20 mA scale). Adjust R7 to
LED VERSIONS
Scale Adustment:
The "Coarse" adjustment RV1 will allow a
limited range of adjustment values. The
"Fine" adjustment RV2 allows for an adjustment range of approximately 1% of the
"Coarse" adjustment.
Apply the full scale input to the meter.
Adjust RV1 to be within 1% of the desired
R12
SCALE ADJ.
COARSE
SCALE ADJ.
FINE
Note: Any physical damage to the meter
during adjustment will void the warranty.
OFFSET ADJ.
COARSE
R9
R7
R6
OFFSET ADJ.
FINE
desired result.
The “Coarse” adjustment RV3 will allow
adjustment. The “Fine” adjustment RV4
allows for an adjustment range of
approximately 1% of the “Coarse”
signal (e.g. 4mA on the 4-20mA scale).
Adjust RV3 to within 1% of the desired
Stacking Features
The mounting brackets, included with every Mini-Max, can be connected
together. Multiple units can be mounted in a single opening, allowing
perfect alignment.
To punch one hole for multiple units, be sure to adjust the standard panel
in the hole.
remaining units.
Vertical
Standard cutout
0.88" (22.2mm)
2.68" (68mm)
Vertical
OFFSET ADJ.
COARSE
OFFSET ADJ.
FINE
Note: Any physical damage to the meter
during adjustment will void the warranty.
SCALE ADJ.
COARSE
SCALE ADJ.
FINE
0.071" (1.8mm)
Add to standard
when stacking
Horizontal
Standard cutout
0.88" (22.2 mm)
2.68" (68mm)
Horizontal
0.16" (4.0 mm)
Add to standard when stacking
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