Simpson MINI-MAX M235 User Manual

Mini-Max M235 Series Digital Panel Meter

Minimum Depth Indicator - Less than 2.5” (60mm) of
Space Required Behind the Panel

Stackable Mounting Bracket for Easy I nstallation

LCD: 3-1/2 Digit, 0.5” (12.7mm) High LCD Display with
Optional Negative Image, Bright Red Backlighting

DC Process

LED: 3-1/2 Digit, 0.56” (14.2mm) High Display

Limited Range Display Scaling and Adjustable Oset

Standard Screw Terminals for Easy Installation

Four Ranges: 4-20DCmA, 1-5VDC, 0-10VDC,
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 oer a 3-1/2 digit, 0.5”
(12.7mm) LCD display with an optional bright red, negative
image, backlight.

LED (Light Emitting Diode) Units oer a 3 1/2 digit, 0.56”
(14.2mm) Display

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.

Installation and Panel Cutout

2.68” (68mm)

0.88" (22.2mm)

(68mm)

2.36" (60mm)

0.95"

(24mm)

0.16"

(4mm)

0.13" (3.18mm) Max
Panel Thickness

2.84" (72mm)

2.68"

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

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

erly in the hole.

remaining units.

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 2 times the value of
the input, or a maximum reading of 1.999,
whichever is lower.

Example: A 2 volt input has a maximum
reading of 1.999 counts, so you cannot
double the 2 volts, but you can make a

1 volt input read 1.999.

LOCKING

TAB

LCD VERSIONS

Scale Adjustment:

The "Coarse" adjustment R12 will allow a
limited range of adjustment 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

signal (e.g. 4mA on the 4-20 mA scale). Adjust
R7 to within 1% of the desired value, then use

LED VERSIONS

Scale Adjustment:

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 result. Then use RV2 to

djustment:

The "Coarse" adjustment RV3 will allow

SCALE ADJ.
COARSE

R12

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

Vertical

Standard cutout

0.88" (22.2mm)

2.68" (68mm)

ment. The “Fine” adjustment RV4 allows for
an adjustment range of approximately 1%

input signal (e.g. 4mA on the 4-20 mA scale).
Adjust RV3 to within 1% of the desired value,

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)

Horizontal

2.68" (68mm)

0.16" (4.0 mm)