Mini-Max M235 & M245
Digital Panel Meters
LCD
LED
• 3/64 DIN Indicator
• Unique mounting bracket allows stacking of multiple units
• Screw terminal connectors for easy installation
• LCD: 3-1/2 or 4-1/2 digit, 0.5” high LCD display with optional
negative image, bright red backlighting
• LED: 3-1/2 digit, 0.56” high display
• LED: 4-1/2 digit, 0.40” high display
• Limited range display scaling
1
Rev. 11-19-13
Mini-Max M235 & M245
Digital Panel Meters
Specifications
M235
DISPLAY
Type
Height
Decimal Point (Selectable)
Overrange Indication
Backlighting
Polarity
POWER REQUIREMENTS
AC Volt
DC Volt
POWER CONSUMPTION
85 - 250 VAC
9 - 32 DCV
ISOLATION
ACCURACY @ 25º C
200 Hz ± 0.2% of input ± 0.2 Hz
2 KHz ± 0.2% of input ± 2 Hz
DC V & A ± (0.1% of Reading ± 1 count)
DC 2A
DC 5A
AC TRMS V & A
± (0.5% of Reading + 5 count)
( 50 Hz - 2 KHz )
DC Process
EXCITATION CURRENT
ENVIRONMENTAL
Storage Temperature
Relative Humidity
Temperature Coefficient
WARM-UP TIME
NOISE REJECTION CMRR
A TO D CONVERSION
Technique
Rate
FREQUENCY METER
Technique Frequency-to-voltage
INPUT LEVEL
(Frequency Meter) 500mV to 270 VRMS @ 1.0 Meg ohm
or 5V to 24V SquareWave
(DC offset = 2Vmax)
MECHANICAL
Bezel
Depth
Panel Cutout
Weight
Case Material
3.5 oz. (99.2 g)
94-0, UL-rated, glass-filled thermoplastic
2
Rev. 11-19-13
LCD
M245
7 segment
0.5” (12.7 mm)
3 position
Most significant digit = “1”
Optional negative image, Red Backlight
Auto with “ - “ indication, “ + “ implied
85 - 250 VAC @ 40 - 440Hz
9 - 32 DCV
LCD 4.0 VA (2.4W ) Max.
LCD 3W Max
250 VRMS Max
4 position
0.56” (14.2 mm)
3 position
LED
M235
M245
0.4” (10.2 mm)
4 position
Blinking Display
N/A
Not Available
3.6 VA (2.16W ) Max.
Not Available
Not Available
± (0.04% of Reading ± 1 count)
± (0.1% of Reading ± 1 count)
± (0.04% of Reading ± 1 count)
± (0.25% of Reading ± 1 count)
± (0.5% of Reading ± 1 count)
± (0.5% of Reading + 50 count)
( 50 Hz - 2 KHz )
± (0.5% of Reading + 2 count)
( 50 Hz - 5 KHz )
± (0.5% of Reading + 10 count)
( 50 Hz - 5 KHz )
± (0.02% of Reading ± 1 count)
25mA (Maximum)
0 to 55ºC
-10 to 60ºC
0 to 85% non condensing @ 40ºC
0.2% of input ± 0.5 digits / ºC
Less than 20 minutes
86 dB Typical
Integrating Dual Slope
3 samples/second typical
Not Available
Not Available
0.95” x 2.84” (24 mm x 72 mm)
2.36” (60 mm)
0.88” x 2.68” (22.2 mm x 68 mm)
2.6 oz. (74 g)
Ordering Information
-
Mini-Max M235 & M245
Digital Panel Meters
Mini-Max indicators can be configured by making an entry in each section below.
Example: M245-1-0-71-0.
_____
I
Basic Unit
_____
I
Display
_____
I
DPM Power
Supply
_____
I
Function/
Range
I
Excitation
Output
Select From Each One Below
Basic Unit
M235
M245
3-1/2 Digit
4-1/2 Digit
31
Select From Each One Below
Function / Range (continued)
200 VAC TRMS
2 VAC TRMS
20 VAC TRMS
200 VAC TRMS
270 VAC TRMS
600 VAC TRMS
200 ACµA TRMS
2 ACmA TRMS
20 ACmA TRMS
200 ACmA TRMS
2 ACA TRMS
5 ACA TRMS
4 - 20 DCmA ( DC Process )
1 - 5 DCV ( DC Process )
0 - 10 DCV ( DC Process )
20 - 199.9 Hz RMS
20 - 1999 Hz RMS
20 - 199.9 Hz Sq. Wave
20 - 1999 Hz Sq. Wave
Excitation Output
0
1
2
None
12 DCV @ 25mA
24 DCV @ 25mA
32
33
34
36
35
41
*
Display
0
1
2
Non Backlit (LCD)
Negative Red Backlight (LCD)
Red (LED)
DPM Power Supply
0
2
85 - 250 ACV
9 - 32 DCV
**
†
42
43
*
&
**
44
45
46
71
72
73
81
Function / Range
11
12
13
14
15
21
22
23
24
25
26
*
**
***
†
200 DCmV
2 DCV
20 DCV
200 DCV
600 DCV
200 DCµA
2 DCmA
20 DCmA
200 DCmA
2 DCA
5 DCA
†
82
83
84
**
**
**
**
&
&
&
&
***
***
***
***
Not Available on Frequency (Hz) Meters
Not Available on LED Display
Not Available on M245
Not Available on LCD Display
*
*
4
Rev. 11-19-13
Mini-Max M235 & M245
Digital Panel Meters
Dimensions - M235, M245 & M240
Mounting Requirements
-
Insert the Mini-Max through the panel, and then slide the mounting bracket on to the Mini-Max.
The mounting bracket allows Mini-Max units to be stacked side-to-side or top-to-bottom.
Panel cutout instructions for stacking multiple units are provided in the operator’s manual.
5
Rev. 11-19-13
Real-time operating system RTOS
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