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The Simpson Mini-Max Frequency Indicators provide high quality, accuracy and reliability in a compact, 60mm deep case. Units offer 3-1/2 digit, 0.5” (12.7mm) LCD display and are available with a bright red, negative image backlight option. All units feature user-selectable decimal point, auto zero and 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 standard units have a clear viewing window, and the units with optional negative image, red backlighting have a red window.
| LCD | LED | ||
| M235 | M245 | M235 | M245 |
DISPLAY | ||||
Type | 7 segment | |||
Height | 0.5” (12.7 mm) | 0.56” (14.2 mm) | 0.4” (10.2 mm) | |
Decimal Point (Selectable) | 3 position | 4 position | 3 position | 4 position |
Overrange Indication | Most significant digit = “1” | Blinking Display | ||
Backlighting | Optional negative image, Red Backlight | N/A | ||
Polarity | Auto with “ - “ indication, “ + “ implied | |||
POWER REQUIREMENTS | ||||
AC Volt | 85 - 250 VAC @ 40 - 440Hz | |||
DC Volt | 9 - 32 DCV | Not Available | ||
POWER CONSUMPTION | ||||
85 - 250 VAC | LCD 4.0 VA (2.4W ) Max. | 3.6 VA (2.16W ) Max. | ||
9 - 32 DCV | LCD 3W Max | Not Available | ||
ISOLATION | 250 VRMS Max | |||
ACCURACY @ 25º C | ||||
200 Hz | ± 0.2% of input ± 0.2 Hz |
Not Available | ||
2 KHz | ± 0.2% of input ± 2 Hz | |||
DC V & A | ± (0.1% of Reading ± 1 count) | ± (0.04% of Reading ± 1 count) | ± (0.1% of Reading ± 1 count) | ± (0.04% of Reading ± 1 count) |
DC 2A | ± (0.25% of Reading ± 1 count) | |||
DC 5A | ± (0.5% of Reading ± 1 count) | |||
AC TRMS V & A | ± (0.5% of Reading + 5 count) ( 50 Hz - 2 KHz ) | ± (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 ) |
DC Process | ± (0.02% of Reading ± 1 count) | |||
EXCITATION CURRENT | 25mA (Maximum) | |||
ENVIRONMENTAL | 0 to 55ºC | |||
Storage Temperature | -10 to 60ºC | |||
Relative Humidity | 0 to 85% non condensing @ 40ºC | |||
Temperature Coefficient | 0.2% of input ± 0.5 digits / ºC | |||
WARM-UP TIME | Less than 20 minutes | |||
NOISE REJECTION CMRR | 86 dB Typical | |||
A TO D CONVERSION Technique | Integrating Dual Slope | |||
Rate | 3 samples/second typical | |||
FREQUENCY METER | ||||
Technique | Frequency-to-voltage | Not Available | ||
INPUT LEVEL | ||||
(Frequency Meter) | 500mV to 270 VRMS @ 1.0 Meg ohm or 5V to 24V SquareWave (DC offset = 2Vmax) |
Not Available | ||
MECHANICAL | ||||
Bezel | 0.95” x 2.84” (24 mm x 72 mm) | |||
Depth | 2.36” (60 mm) | |||
Panel Cutout | 0.88” x 2.68” (22.2 mm x 68 mm) | |||
Weight | 3.5 oz. (99.2 g) | 2.6 oz. (74 g) | ||
Case Material | 94-0, UL-rated, glass-filled thermoplastic | |||
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